Novel magnetic tile for noise reduction

Abstract

The utility model discloses a novel magnetic shoe for noise reduction, which comprises a rotor casing, a plurality of equidistant magnetic shoe bodies annularly distributed in the rotor casing, a rear sealing cover fixed at an opening at one end of the rotor casing, and anti-deviation plug-in structures arranged at one ends of the magnetic shoe bodies and on the surface of the rear sealing cover. One end of the surface of the magnetic shoe body is provided with a convex hollow positioning ring which is equal to the inner diameter of a rotor casing, and a glue gap part is arranged between the back surface of the magnetic shoe body and the inner wall of the rotor casing. According to the utility model, the glue is ensured to form a uniform, stable and heavy bonding layer in the whole connection area, the overall connection strength and stability of the rotor casing and the magnetic tile body are improved, and the existence of the glue gap part enables the connection structure to be more flexible, so that the vibration and impact generated in the operation of the motor can be better absorbed, and the service life of the motor is prolonged. And the influence of the external force on the connection of the magnetic tile and the shell can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of magnetic tiles, in particular to a novel magnetic tile for noise reduction. Background Art

[0002] As an important component of the motor, the core function of the magnetic tile is to generate a stable magnetic field, drive the motor to convert electromagnetic energy, and finally realize mechanical movement. Its structure is usually composed of permanent magnetic materials such as cobalt magnets or neodymium iron boron, and has good magnetic properties. Some magnetic tiles also have the function of noise reduction. The principle of the magnetic tile involves electromagnetic induction and Lorentz force. When the current passes through the motor coil, it interacts with the magnetic tile to cause the magnetic tile to generate magnetic force, which drives the motor to operate. In the DC motor, it can be divided into two configurations: permanent magnet DC motor and electromagnetic excitation DC motor. The magnetic tile is usually installed on the rotor. For example, a 4P DC permanent magnet brushed motor magnetic tile fixing structure disclosed by the authorization announcement number CN213521428U includes a cylindrical casing that passes through from top to bottom, and a plurality of positioning blocks and a plurality of tile clips are symmetrically arranged on the inner side walls of the casing. The left and right sides of the positioning block are provided with V-shaped positioning block slots for clamping and fixing with the magnetic tile. The front and rear surfaces of the positioning block are through-set with screw holes for positioning the block when it is installed with the aid of tooling Screw socket positioning, the magnetic tile is an axially symmetrical arc-shaped tile-like structure, which allows the magnetic tile to be completely inserted into the grooves of the positioning block and the tile card, and can ensure that the magnetic tile will not fall off after the glue fails. However, in this technical solution, the back of the magnetic tile is in surface contact with the inner wall of the rotor casing, and the gap between the two is low, which makes it difficult for the glue to fully cover the space between the magnetic tile and the casing. When the motor is running, a certain amount of heat will be generated, especially under high load and long-term operation. Due to uneven and insufficient glue filling, heat diffusion in certain areas may be restricted, causing local temperature rise, which may lead to a decrease in glue performance and even cause glue failure, affecting the firm connection between the magnetic tile and the casing. Even if an anti-stuck structure is designed, it is difficult to fundamentally solve the problem of loose bonding between the two. In addition, the motor will also generate vibration and impact during operation, especially under frequent starting and stopping conditions. If the glue is not filled evenly, the connection between the magnetic tile and the casing will not be strong enough, and vibration and impact cannot be effectively transmitted. Utility Model Content

[0003] The purpose of the utility model is to provide a novel magnetic tile for noise reduction to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a new type of magnetic tile for noise reduction, comprising a rotor casing and a plurality of equidistant magnetic tile bodies distributed in a ring shape inside the rotor casing, a rear sealing cover fixed at an opening at one end of the rotor casing, one end of the magnetic tile body and the surface of the rear sealing cover are provided with an anti-bias plug-in structure, one end of the surface of the magnetic tile body is provided with a convex-shaped hollow positioning ring equal to the inner diameter of the rotor casing, a glue-retaining gap is provided between the back side of the magnetic tile body and the inner wall of the rotor casing, and a sound-absorbing and noise-reduction structure is provided on the outer wall of the magnetic tile body on one side close to the center point of the rotor casing.

[0005] Preferably, the anti-biased insertion structure is a calibration hole fixed at the bottom end of the magnetic tile body, and a columnar protrusion arranged on the surface of the rear sealing cover and concentric with the calibration hole, and the inner diameter of the calibration hole is equal to the outer diameter of the columnar protrusion.

[0006] Preferably, planar portions are provided on both side outer walls of the magnetic tile body.

[0007] Preferably, both outer walls of the convex-shaped hollow positioning ring and the magnetic tile body are provided with inner recesses extending toward the center line thereof.

[0008] Preferably, the sound absorbing and noise reducing structure is an arc frame hollow sound absorbing box integrally formed on the outer wall of the magnetic tile body on one side close to the center point of the rotor casing, and a cavity arranged inside the arc frame hollow sound absorbing box.

[0009] Preferably, a plurality of through holes are provided on the outer wall of one side of the arc frame hollow sound absorbing box close to the center point of the rotor casing.

[0010] Compared with the prior art, the beneficial effects of the utility model are as follows: the new type of magnetic tile for noise reduction is provided with a rear sealing cover and a convex hollow positioning ring and other structures that cooperate with each other, and the anti-bias plug-in structure is used to insert the magnetic tile body into the cylindrical structure composed of the rotor casing and the rear sealing cover, and the glue paste inside the glue gap portion fully connects the rotor casing and the magnetic tile body. The addition of the glue gap portion can ensure that the glue is more evenly distributed between the magnetic tile and the casing, which helps to eliminate the uneven filling problem mentioned earlier, and ensure that the glue forms a uniform, stable, and thick bonding layer in the entire connection area, thereby improving the overall strength and stability of the connection between the rotor casing and the magnetic tile body. The presence of the glue gap portion makes the connection structure more flexible, which can better absorb the vibration and impact generated during the operation of the motor, and helps to reduce the influence of these external forces on the connection between the magnetic tile and the casing. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 The three-dimensional structure of the utility model is shown in FIG. Figure 1 ;

[0012] Figure 2The three-dimensional structure of the utility model is shown in FIG. Figure 2 ;

[0013] Figure 3 This is a schematic diagram of the structure of the utility model when the rear sealing cover is removed and viewed from above;

[0014] Figure 4 The three-dimensional structure of the magnetic tile body of the utility model is shown in FIG. Figure 1 ;

[0015] Figure 5 The three-dimensional structure of the magnetic tile body of the utility model is shown in FIG. Figure 2 ;

[0016] In the figure: 1, rotor housing; 2, magnetic tile body; 201, calibration hole; 202, flat part; 203, concave part; 3, rear sealing cover; 4, arc frame hollow sound-absorbing box; 401, through hole; 5, cavity; 6, convex hollow positioning ring; 7, glue gap part. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] See also Figure 1-4 The utility model provides an embodiment: a new type of magnetic tile for noise reduction, comprising a rotor housing 1 and a plurality of equally spaced magnetic tile bodies 2 annularly distributed inside the rotor housing 1, and a flat portion 202 is provided on both sides of the outer wall of the magnetic tile body 2;

[0019] A rear sealing cover 3 is fixed at the opening of one end of the rotor housing 1, and an anti-deflection plug-in structure is provided on one end of the magnetic tile body 2 and the surface of the rear sealing cover 3. A convex-shaped hollow positioning ring 6 having the same inner diameter as the rotor housing 1 is provided on one end of the surface of the magnetic tile body 2. The convex-shaped hollow positioning ring 6 and the outer walls on both sides of the magnetic tile body 2 are both provided with inner recesses 203 extending toward the center line direction of the magnetic tile body 2.

[0020] A glue gap 7 is provided between the back of the magnetic tile body 2 and the inner wall of the rotor housing 1. The provision of the glue gap 7 also makes it easier to maintain and repair the motor. If the connection structure needs to be maintained or repaired, the glue gap 7 can be entered more easily for operation.

[0021] The anti-bias plug-in structure is a calibration hole 201 fixed at the bottom end of the magnetic tile body 2, and a columnar protrusion arranged on the surface of the rear sealing cover 3 and concentric with the calibration hole 201. The inner diameter of the calibration hole 201 is equal to the outer diameter of the columnar protrusion. When the magnetic tile body 2 and the rear sealing cover 3 are connected, the calibration hole 201 at the bottom end of the magnetic tile body 2 and the columnar protrusion on the surface of the rear sealing cover 3 are plugged into each other, thereby ensuring a stable connection between the magnetic tile body 2 and the rear sealing cover 3. Even if the adhesive paste is aged, broken or failed, the anti-bias plug-in structure can effectively prevent the magnetic tile from detaching from the casing, avoiding the malfunction and safety hazards caused by it.

[0022] A sound-absorbing and noise-reducing structure is arranged on the outer wall of the magnetic tile body 2 on one side close to the center point of the rotor casing 1. The sound-absorbing and noise-reducing structure is an arc-frame hollow sound-absorbing box 4 integrally formed on the outer wall of the magnetic tile body 2 on one side close to the center point of the rotor casing 1, and a cavity 5 arranged inside the arc-frame hollow sound-absorbing box 4. A plurality of through holes 401 are arranged on the outer wall of the arc-frame hollow sound-absorbing box 4 on one side close to the center point of the rotor casing 1. During the use of the magnetic tile, an arc-frame hollow sound-absorbing box 4 is arranged on the outer wall of the magnetic tile body 2 on one side close to the center point of the rotor casing 1, and a cavity 5 and a through hole 401 are arranged inside and on the outer surface of the arc-frame hollow sound-absorbing box 4. By reasonably arranging the through hole 401, the resonance of the structure can be destroyed, and the amplification effect of the resonance effect on the noise can be reduced. The cavity 5 can effectively absorb the noise inside the sound-absorbing box, thereby reducing the propagation of noise to the surrounding environment, helping to improve the quietness of the working environment when the motor is running, and reducing the impact of noise on surrounding personnel and equipment.

[0023] When the embodiment of the present application is in use, the staff first takes out the magnetic tile body 2 to be assembled, and applies the paste on the back of the magnetic tile body 2, and then uses the anti-bias plug-in structure to insert the magnetic tile body 2 into the cylindrical structure composed of the rotor casing 1 and the rear sealing cover 3. At this time, the back of the convex-shaped hollow positioning ring 6 is in contact with the inner wall of the rotor casing 1, and a glue gap 7 is formed between the back of the magnetic tile body 2 and the inner wall of the rotor casing 1 through the convex-shaped hollow positioning ring 6, and the glue in the interference state is located in the glue gap 7 between the magnetic tile body 2 and the rotor casing 1. The anti-bias plug-in structure and the glue inside the glue gap 7 are used to fully connect the rotor casing 1 and the magnetic tile body 2, and then the staff follows the same steps to install it. The remaining magnetic tile bodies 2 are sufficient. By adding a glue-retaining gap portion 7, the magnetic tile can ensure that the glue is more evenly distributed between the magnetic tile and the casing, which helps to eliminate the uneven filling problem mentioned earlier and ensures that the glue forms a uniform, stable and thick bonding layer in the entire connection area, thereby improving the overall strength and stability of the connection between the rotor casing 1 and the magnetic tile body 2. The heat generated during the operation of the motor can be fully distributed in the entire connection area through the glue, thereby alleviating the problem of local temperature increase. At the same time, the presence of the glue-retaining gap portion 7 makes the connection structure more flexible, which can better absorb the vibration and impact generated during the operation of the motor, thereby helping to reduce the impact of these external forces on the connection between the magnetic tile and the casing, and reducing the fatigue of the structure.

Claims

1. A new type of magnetic tile for noise reduction, characterized in that: The invention comprises a rotor casing (1) and a plurality of equidistant magnetic tile bodies (2) annularly distributed inside the rotor casing (1); a rear sealing cover (3) fixed at an opening at one end of the rotor casing (1); an anti-bias plug-in structure is provided on one end of the magnetic tile body (2) and the surface of the rear sealing cover (3); a convex hollow positioning ring (6) having the same inner diameter as the rotor casing (1) is provided on one end of the surface of the magnetic tile body (2); a glue-retaining gap (7) is provided between the back side of the magnetic tile body (2) and the inner wall of the rotor casing (1); and a sound-absorbing and noise-reducing structure is provided on the outer wall of the magnetic tile body (2) on one side close to the center point of the rotor casing (1).

2. The novel magnetic tile for noise reduction according to claim 1 is characterized in that: The anti-biased insertion structure comprises a calibration hole (201) fixed at the bottom end of the magnetic tile body (2), and a columnar protrusion arranged on the surface of the rear sealing cover (3) and concentric with the calibration hole (201); the inner diameter of the calibration hole (201) is equal to the outer diameter of the columnar protrusion.

3. The novel magnetic tile for noise reduction according to claim 1 is characterized in that: Plane portions (202) are provided on both side outer walls of the magnetic tile body (2).

4. The novel magnetic tile for noise reduction according to claim 1 is characterized in that: The outer walls on both sides of the convex hollow positioning ring (6) and the magnetic tile body (2) are both provided with inner recesses (203) extending in the direction of their own center lines.

5. The novel magnetic tile for noise reduction according to claim 1 is characterized in that: The sound absorption and noise reduction structure comprises an arc frame hollow sound absorption box (4) integrally formed on the outer wall of the magnetic tile body (2) on one side close to the center point of the rotor housing (1), and a cavity (5) arranged inside the arc frame hollow sound absorption box (4).

6. The novel magnetic tile for noise reduction according to claim 5 is characterized in that: A plurality of through holes (401) are provided on the outer wall of one side of the arc frame hollow sound absorbing box (4) close to the center point of the rotor casing (1).

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